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The thermal-structural behaviour and performance of fusion power plant first wall concepts is analysed with the aid of a finite element analysis code. The thermal and structural analysis comprises performance comparisons of rectangular, circular and elliptical cross-section cooling channels, assuming as first wall structural materials the austenitic (316) and martensitic (Manet) stainless steels and a vanadium alloy. A parametric study is included with variable surface heat flux, in the range 0.1-0.6 MW/m2 and volumetric heat flux in the range 15-25 MW/m3. For steady state operation, the maximum temperature is in the range of 550-650 C, maximum thermal stress in the range of 150-650 MPa and maximum strain in the range of 0.13-0.27. In general, the designs examined are shown to be capable of withstanding the loading conditions imposed, although the effect of such factors as pulsed or part load operation can be problematic.

Additional information

Authors: KARDITSAS P J, AEA Fusion, Culham Laboratory, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: AEA/FUS 250 EN (1993) 21 pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
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